The mechanism of bubble growth in a simple shear flow.

Abstract

The growth of bubble in shear flow and uniform flow is studied numerically (with F. E. M.) and experimentally. The calculated results indicate that the growth rate of bubble in shear flow is not influenced by the condition of flow, and in the case where the bubble viscosity ratio is approximately one, the growth rate of bubble is equal to that of rigid gas-liquid interface. The experimental results show that the growth rate of bubble in shear flow is lower than that in uniform flow; and in shear flow and uniform flow the interfacial resistance against gas diffusion increases with decreasing the interfacial area of bubble.